+###############################################################################
+#
+# Check for -lgdk_pixbuf.
+# These tests are for gdk_pixbuf usage of the hacks,
+# not xscreensaver-demo (thus we have to test again to get
+# the libraries right: don't want to pull in all of GTK
+# for the hacks.)
+#
+###############################################################################
+
+have_gdk_pixbuf=no
+with_gdk_pixbuf_req=unspecified
+AC_ARG_WITH(pixbuf,
+[ --with-pixbuf Include support for the GDK-Pixbuf library in some
+ demos, which will make it possible for them to read
+ GIF, JPEG, and PNG files as well.],
+ [with_gdk_pixbuf="$withval"; with_gdk_pixbuf_req="$withval"],
+ [with_gdk_pixbuf=yes])
+
+# if --with-pixbuf=/directory/ was specified, remember that directory so that
+# we can also look for the `gdk-pixbuf-config' program in that directory.
+case "$with_gdk_pixbuf" in
+ /*)
+ gdk_pixbuf_dir="$with_gdk_pixbuf"
+ ;;
+ *)
+ gdk_pixbuf_dir=""
+ ;;
+esac
+
+HANDLE_X_PATH_ARG(with_gdk_pixbuf, --with-pixbuf, GDK_PIXBUF)
+
+if test "$with_gdk_pixbuf" != yes -a "$with_gdk_pixbuf" != no ; then
+ echo "error: must be yes or no: --with-pixbuf=$with_gdk_pixbuf"
+ exit 1
+fi
+
+if test "$with_gdk_pixbuf" = yes; then
+ have_gdk_pixbuf=no
+
+ pkgs=''
+ ok="yes"
+
+ pkg_check_version gdk-pixbuf-2.0 2.0.0
+ pkg_check_version gdk-pixbuf-xlib-2.0 2.0.0
+ have_gdk_pixbuf="$ok"
+
+ if test "$have_gdk_pixbuf" = yes; then
+ AC_CACHE_CHECK([for gdk-pixbuf includes], ac_cv_gdk_pixbuf_config_cflags,
+ [ac_cv_gdk_pixbuf_config_cflags=`$pkg_config --cflags $pkgs`])
+ AC_CACHE_CHECK([for gdk-pixbuf libs], ac_cv_gdk_pixbuf_config_libs,
+ [ac_cv_gdk_pixbuf_config_libs=`$pkg_config --libs $pkgs`])
+ fi
+ ac_gdk_pixbuf_config_cflags=$ac_cv_gdk_pixbuf_config_cflags
+ ac_gdk_pixbuf_config_libs=$ac_cv_gdk_pixbuf_config_libs
+
+
+ if test "$have_gdk_pixbuf" = yes; then
+ #
+ # we appear to have pixbuf; check for headers/libs to be sure.
+ #
+ ac_save_gdk_pixbuf_CPPFLAGS="$CPPFLAGS"
+ CPPFLAGS="$CPPFLAGS $ac_gdk_pixbuf_config_cflags"
+
+ have_gdk_pixbuf=no
+
+ # check for header A...
+ AC_CHECK_X_HEADER(gdk-pixbuf/gdk-pixbuf.h, [have_gdk_pixbuf=yes])
+
+ # if that worked, check for header B...
+ if test "$have_gdk_pixbuf" = yes; then
+ have_gdk_pixbuf=no
+ gdk_pixbuf_halfassed=yes
+ AC_CHECK_X_HEADER(gdk-pixbuf/gdk-pixbuf-xlib.h,
+ [have_gdk_pixbuf=yes
+ gdk_pixbuf_halfassed=no])
+
+ # yay, it has a new name in Gtk 2.x...
+ if test "$have_gdk_pixbuf" = no; then
+ have_gdk_pixbuf=no
+ gdk_pixbuf_halfassed=yes
+ AC_CHECK_X_HEADER(gdk-pixbuf-xlib/gdk-pixbuf-xlib.h,
+ [have_gdk_pixbuf=yes
+ gdk_pixbuf_halfassed=no])
+ fi
+ fi
+ CPPFLAGS="$ac_save_gdk_pixbuf_CPPFLAGS"
+ fi
+
+ if test "$have_gdk_pixbuf" = yes; then
+ # we have the headers, now check for the libraries
+ have_gdk_pixbuf=no
+ gdk_pixbuf_halfassed=yes
+
+ AC_MSG_RESULT(checking for gdk_pixbuf usability...)
+
+ # library A...
+ AC_CHECK_X_LIB(c, gdk_pixbuf_new_from_file, [have_gdk_pixbuf=yes],,
+ $ac_gdk_pixbuf_config_libs -lX11 -lXext -lm)
+ # library B...
+ if test "$have_gdk_pixbuf" = yes; then
+ have_gdk_pixbuf=no
+ AC_CHECK_X_LIB(c, gdk_pixbuf_xlib_init,
+ [have_gdk_pixbuf=yes
+ gdk_pixbuf_halfassed=no],,
+ $ac_gdk_pixbuf_config_libs -lX11 -lXext -lm)
+ fi
+ fi
+
+ if test "$have_gdk_pixbuf" = yes; then
+ INCLUDES="$INCLUDES $ac_gdk_pixbuf_config_cflags"
+ XPM_LIBS="$ac_gdk_pixbuf_config_libs"
+ AC_DEFINE(HAVE_GDK_PIXBUF)
+ else
+ AC_MSG_RESULT(checking for gdk_pixbuf usability... no)
+ fi
+fi
+